//
//  UserAccount.swift
//  SinaWeibo
//
//  Created by 张洪毓 on 15/11/10.
//  Copyright © 2015年 张洪毓. All rights reserved.
//

import UIKit

class UserAccount: NSObject,NSCoding {

    var access_token: String?
//    var expires_in: NSTimeInterval = 0
    // access_token的生命周期
    var expires_in: NSTimeInterval = 0 {
        didSet{
            expires_date = NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    // 过期时间
    var expires_date : NSDate?
    var uid: String?
    var avatar_large: String?
    var name: String?
    
    init(dict: [String: AnyObject]) {
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    override func setValue(value: AnyObject?, forUndefinedKey key: String) { }
    
    override var description: String {
        let keys = ["access_token","expires_in","uid","avatar_large","name","expires_date"]
        return dictionaryWithValuesForKeys(keys).description
    }
    
//MARk:  对外提供归档方法
    func saveAccount() {
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        
        NSKeyedArchiver.archiveRootObject(self, toFile: path)
    }
    
//MARk:  对外提供解档方法
    class func loadAccount() -> UserAccount?  {
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? UserAccount {
            // 判断用户的token是否过期
            if account.expires_date?.compare(NSDate()) == NSComparisonResult.OrderedDescending {
                return account
                }
            }
        return nil
    }
    
//MARk:  实现 NSCoding 的协议方法
    // 解档：将磁盘中的二进制数据转换成自定义对象
   required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObjectForKey("access_token") as? String
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        uid = aDecoder.decodeObjectForKey("uid") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
        name = aDecoder.decodeObjectForKey("name") as? String
        expires_date = aDecoder.decodeObjectForKey("expires_date") as? NSDate
    }
    // 归档：将对象转换成二进制数据保存到磁盘中
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(expires_date, forKey: "expires_date")
    }
    
}
